DAIHEN CORPORATION Patent applications |
Patent application number | Title | Published |
20150153729 | WORKPIECE PROCESSING APPARATUS AND WORKPIECE TRANSFER SYSTEM - A workpiece processing apparatus includes: a first rotational distance information storage unit that stores multiple pieces of first rotational distance information, each of which is information having, in association with each other, a rotational angle, and first distance information regarding a distance from a rotation center to an edge of a circular workpiece corresponding to the rotational angle, in a case where the workpiece is rotated; an acquiring unit that acquires information for positioning the workpiece, information for specifying an orientation of the workpiece, and information regarding a defective portion at the edge of the workpiece, using the multiple pieces of first rotational distance information stored in the first rotational distance information storage unit; and an output unit that outputs the information for positioning the workpiece, the information for specifying the orientation of the workpiece, and the information regarding the defective portion, which are acquired by the acquiring unit. | 06-04-2015 |
20150027995 | SOLID WIRE, AND GAS-SHIELDED ARC WELDING METHOD USING SAME - A solid wire is for gas-shielded arc welding, using a shielding gas, and for galvanized steel sheet welding. The solid wire comprises, to the mass of the whole of the solid wire, predetermined amount of C, Si, Mn, P, S, O, and Cr, with the balance consisting Fe and inevitable impurities. The solid wire satisfies “1.0≦(percentage by mass of Si+that by mass of Mn)/{100(that by mass of S+that by mass of O}≦4.0” and “0.50≦percentage by mass of Mn/that by mass of Si≦2.00”. The shielding gas is an Ar gas comprising 25 to 40% of CO | 01-29-2015 |
20140354173 | IMPEDANCE MATCHING DEVICE - An impedance matching device includes an input port connected to a high-frequency power supply, an output port connected to a load, an impedance variable circuit, a T-parameter memory for storing sets of T-parameters in a manner such that each of the sets of T-parameters is related to a corresponding one of adjustable impedance values of the device, an input voltage detector for detecting a forward wave voltage and a reflected wave voltage at the input port, and a p-p value calculator for computation of a p-p value of a high-frequency voltage at the output port. The computation of the p-p value of the high-frequency voltage is performed by using the forward wave voltage and the reflected wave voltage detected at the input port and also using one set of the T-parameters stored in the T-parameter memory. | 12-04-2014 |
20140354067 | WIRELESS POWER TRANSMISSION SYSTEM AND METHOD FOR DESIGNING THE SAME - A wireless power transmission system includes a transmitting antenna, a power supply for supplying power of a resonance frequency f | 12-04-2014 |
20140292441 | POWER COMBINER AND POWER DIVIDER - There is provided a power combiner configured to combine high-frequency powers such that the high-frequency powers respectively input to a plurality of input terminals are output from one output terminal via transmission circuits respectively connected to the input terminals. The respective input terminals are connected to one ends of resistances in parallel with the respective transmission circuits and the other ends of the resistances are connected to each other, so that the input terminals are connected to each other through the resistances connected to the respective input terminals. Each of the transmission circuits is comprised of a circuit in which a first inductor, a transmission section having a constant characteristic impedance and a second inductor are connected to each other in series. | 10-02-2014 |
20140091875 | IMPEDANCE ADJUSTING APPARATUS - An impedance adjustment apparatus of the invention performs impedance matching using characteristic parameters, even where a high frequency power source of variable frequencies is used. The apparatus is applicable to a power supply system using a high frequency power source of variable frequencies. Characteristic parameters obtained by targeting a portion of combinations of position information (C) of a variable capacitor and output frequency information (F) of the power source are stored in a memory. A T-parameter acquisition unit acquires characteristic parameters corresponding to (C | 04-03-2014 |
20140086717 | WORKPIECE CONVEYING ROBOT - A workpiece conveying robot includes a base unit, a moving unit configured to move with respect to the base unit, a driving mechanism that drives the moving unit, and a detection unit. The moving unit includes a hand on which a workpiece is to be placed. The detection unit serves to detect information about the workpiece. Specifically, the detection unit includes a sensor provided at the hand, a base unit-side terminal provided at the base unit, and a moving unit-side terminal provided at the moving unit and electrically connected to the sensor. The base unit-side terminal and the moving unit-side terminal are brought into contact with each other when the moving unit is at a predetermined position. | 03-27-2014 |
20140081457 | CALCULATING APPARATUS, TRANSFER ROBOT SYSTEM, AND CALCULATING METHOD - A calculating apparatus includes an acquiring portion and a calculating portion. The acquiring portion acquires a center position of a wafer placed on an alignment apparatus, and a wafer angle corresponding to a marker such as an orientation flat. The calculating portion calculates by using the wafer center position and the wafer angle, a rotational angle of the wafer on the alignment apparatus, an approach angle, which is an angle of a direction in which a transfer robot approaches the wafer, and a distance between the wafer after the rotation and the transfer robot. Then, the alignment apparatus rotates the wafer by the rotational angle. The transfer robot turns by the approach angle. Subsequently, the transfer robot extends its arm according to the distance, thereby approaching the wafer, and retrieves the wafer. | 03-20-2014 |
20140027423 | CONSUMABLE ELECTRODE ARC WELDING METHOD - A consumable electrode arc welding method includes the detecting of a constriction formed in a molten droplet of the welding wire so as to reduce the welding current, the detecting of a smoothed value of the welding current, and the feedback controlling of the feed rate of the welding wire so as to make the smoothed value of the welding current correspond to a predetermined current setting value. The constriction detection is performed repetitively in a predetermined cycle. | 01-30-2014 |
20130294870 | CARRIER DEVICE - There is provided a carrier device that has a linkage arm mechanism, in particular, a carrier device that cools the linkage arm mechanism and can reduce the impact of radiation heat from a work that is in a high temperature state. A carrier device is a carrier device that includes a linkage arm mechanism and a pivot shaft, and the linkage arm mechanism includes lower arms and upper arms, and one ends of which are respectively connected to the lower arms, and horizontal movement members that support a work that is connected to the other ends of the upper arms, and cooling plates are respectively arranged between the upper arms, and the horizontal movement members. | 11-07-2013 |
20130143702 | BELT DRIVING APPARATUS - A belt driving apparatus includes a driving pulley r a driven pulley and an endless toothed belt. Each of the driving pulley and the driven pulley includes an outer circumference surface provided with a plurality of teeth. The toothed belt, wound around the driving pulley and the first driven pulley, includes an inner surface provided with a plurality of teeth arranged to mesh with the teeth of the driving pulley and the first driven pulley. The belt driving apparatus also includes an idler pulley having a belt contact surface coming into contact with the outer surface of the toothed belt. As viewed along the width direction of the belt contact surface, the idler pulley includes a center portion and two end portions sandwiching the center portion. The center portion of the idler pulley is greater in diameter than each of the two end portions. | 06-06-2013 |
20130126482 | POWER SUPPLY DEVICE AND ARC MACHINING POWER SUPPLY DEVICE - A power supply device that is applicable to both 200 V and 400 V series input power by switching the operation of an auxiliary switching circuit with a switching switch. When a relatively large output is requested, PWM control is performed to adjust the on pulse width of a control pulse signal provided to switching elements of an inverter circuit and an auxiliary switching circuit, which is operated in cooperation with the inverter circuit. When a relatively small output is requested, PSM control is performed to adjusting a phase difference of two control pulse signals provided to the same set of switching elements in the inverter circuit. | 05-23-2013 |
20130082636 | SIGNAL PROCESSOR, FILTER, CONTROL CIRCUIT FOR POWER CONVERTER CIRCUIT, INTERCONNECTION INVERTER SYSTEM AND PWM CONVERTER SYSTEM - A signal processor is configured to perform a process equivalent to performing a series of fixed-to-rotating coordinate conversion, a predetermined process and then rotating-to-fixed coordinate conversion, while maintaining linearity and time-invariance. The signal processor performs a process given by the following matrix G: | 04-04-2013 |
20130082620 | HIGH FREQUENCY POWER SUPPLY DEVICE - A high frequency power supply device includes a high frequency power generation unit configured to output a high frequency power to be supplied to a load and a control unit configured to detect a mean value of the high frequency power to control the high frequency power generation unit. A power change period detection unit detects a period of a level change of the high frequency power that is detected at an output side of the high frequency power generation unit due to a periodic change of a level of a high frequency power that is given to a load from another high frequency power supply device as a power change period T | 04-04-2013 |
20130058740 | Workpiece Transfer Apparatus - The vacuum seal unit of a workpiece transfer apparatus includes a plurality of seal rings and a cooling flow passage formed so as to circulate through inside a rotating shaft and a workpiece transfer mechanism. The seal rings adjacent to each other with a spacing therebetween, out of the plurality of seal rings, and the rotating shaft define a first space and a second space independent from each other and respectively surrounding the periphery of the rotating shaft. An end portion of the cooling flow passage communicates with the first space, and the other end of the cooling flow passage communicates with the second space. Even when the rotating shaft is rotating about the axial center, a coolant supplied to the second space can flow through the cooling flow passage and be supplied to the first space, thereby enabling cooling with high efficiency without restriction on the angle of rotation. | 03-07-2013 |
20130019626 | Cooling Unit And Work Piece Conveying Equipment Using It - An object is to provide a cooling unit which can reduce influence of radiation heat from a work piece having high temperature on members surrounding the work piece, prevent leak of coolant and vacuum leak, reduce cost, and prevent turning angle of a work piece conveying mechanism from being limited. The cooling unit is attached to the work piece conveying mechanism in the state that the outer wall part is in close contact with the to-be-cooled surface. The coolant stored in the lower space is evaporated by the heat transmitted from the to-be-cooled surface P via the outer wall part, and the to-be-cooled surface is cooled via the outer wall part by the heat of evaporation lost at the time of the evaporation of the coolant. The vapor in the lower space (coolant container) is discharged to the vacuum chamber by the vapor exhaust unit when the pressure of the vapor in the lower space reaches the fixed value or higher. | 01-24-2013 |
20120250370 | HIGH FREQUENCY POWER SUPPLY DEVICE - There is provided a high frequency power supply device. The power control unit comprises an impedance adjuster that includes a variable reactance element and adjusts a load side impedance by changing a reactance value of the variable reactance element, and an impedance control unit that controls the variable reactance element of the impedance adjuster in response to a power value detected by a power detection unit so as to perform control of approximating the power value of the high frequency power, which is fed from the high frequency power generation unit to the load, to the setting value or control of maintaining the power value within the set allowable range by changing a resistance of the load side impedance in response to the power value detected by the power detection unit. | 10-04-2012 |
20120249161 | LOAD SIMULATOR - A load simulator includes a passive element, two electrode plates that are connected to the passive element, and a bias applier. The bias applier is a coil spring, for example, and is provided between the two electrode plates. The bias applier biases at least one of the two electrode plates in a predetermined direction. The two electrode plates are disposed so as to be substantially parallel with each other, for example, and the bias applier biases the two electrode plates in the direction of separation from each other. | 10-04-2012 |
20120243276 | CONTROL CIRCUIT FOR CONTROLLING POWER CONVERSION CIRCUIT, INVERTER APPARATUS INCLUDING THE CONTROL CIRCUIT, AND INTERCONNECTION INVERTER SYSTEM INCLUDING THE INVERTER APPARATUS - A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu | 09-27-2012 |
20120201641 | WORKPIECE TRANSFER APPARATUS - A workpiece transfer apparatus includes a stationary base, an elevation base, first and second arms, a workpiece-holding hand, and a driving mechanism for the hand. The first arm is supported on the elevation base so as to be rotatable about a first vertical axis. The second arm is supported on the distal end of the first arm such that the second arm is rotatable about a second vertical axis. The hand is supported on the distal end of the second arm so as to be rotatable about a third vertical axis. A motor is arranged in the first arm, whereas a transmission is arranged to extend in a region from the interior of the first arm through the interior of the second arm. | 08-09-2012 |
20120201633 | WORKPIECE TRANSFER SYSTEM AND FRAME STRUCTURE FOR TRANSFER CHAMBER - A workpiece transfer system includes a transfer chamber in which a workpiece transfer apparatus is installed, and a load port provided adjacent to the transfer chamber. The transfer chamber includes a frame structure made of steel. The frame structure includes a first frame member and a second frame member. The first frame member is set on the floor, and the workpiece transfer apparatus is installed thereon. The second frame member is arranged in a standing posture with respect to the first frame member and which supports the load port. | 08-09-2012 |
20120199560 | WELDING DEVICE AND CARBON DIOXIDE GAS SHIELDED ARC WELDING METHOD - A welding device includes a power supply circuit for applying a voltage across a torch and a base metal, and a power supply control device. The power supply control device controls the power supply circuit such that a high level current is output during a first arc period Ta | 08-09-2012 |
20120140524 | POWER SUPPLY AND ARC PROCESSING POWER SUPPLY - A power supply that performs output PWM control and PSM control. The PWM control is performed when the required output is such that a control signal is set with a larger ON pulse width than a predetermined narrow pulse width allowing for sufficient activation of switching elements in an inverter circuit and an auxiliary switching circuit. The PSM control is performed when the required output is such that the control signal for each switching element is set with a smaller ON pulse width than the predetermined narrow pulse width. The PSM control adjusts the phase of a control pulse signal so that the ON pulse is fixed to the predetermined narrow pulse width. | 06-07-2012 |
20120084037 | HIGH FREQUENCY MEASUREMENT APPARATUS AND CALIBRATION METHOD FOR HIGH FREQUENCY MEASUREMENT APPARATUS - A method for calibrating voltage and current detected by a high frequency measurement apparatus is provided. By the method, a basic calibration parameter for a wide impedance range but with low accuracy and quadrant-specific calibration parameters for highly accurate calibration are calculated. This calculation is performed based, on values obtained by measuring three reference loads and true values of the reference loads. A first calibration unit of the apparatus calibrates the detected voltage and current by using the basic calibration parameter. A quadrant determining unit of the apparatus determines in which quadrant an impedance calculated from the calibrated voltage and current lies. A second calibration unit of the apparatus further calibrates the voltage and current by using a quadrant-specific calibration parameter corresponding to the determination result input from the quadrant determining unit. | 04-05-2012 |
20120076245 | SIGNAL DETECTION APPARATUS - A signal detection apparatus detects the frequency of an input signal without using a PLL. The detection apparatus includes a first and a second orthogonalizer, a phase difference calculator and an integrator, to control the variable coefficient a | 03-29-2012 |
20120019267 | HIGH FREQUENCY DETECTION DEVICE AND COAXIAL CABLE INCLUDING THE SAME - The present invention provides a high frequency detection device that detects a high frequency voltage signal according to a high frequency voltage generated in a power transmission body. The high frequency detection device includes a substrate and a capacitance conductor fixed to the substrate. The capacitance conductor includes a penetration portion and a capacitor electrode. In the penetration portion, the power transmission body is disposed so as to extend along the penetration portion in a state in which the axial direction of the power transmission body and the substrate are substantially orthogonal. The capacitor electrode is provided to be opposed to the power transmission body. | 01-26-2012 |
20110285412 | CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, AND CURRENT/VOLTAGE DETECTOR USING SAME, AND CURRENT DETECTOR AND VOLTAGE DETECTOR - A current detection printed board includes: a board having a penetration hole that penetrates the board; and at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, wherein, when a conductor, in which an AC current flows, is disposed to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction. | 11-24-2011 |
20110262251 | WORKPIECE CONVEYING SYSTEM - A workpiece conveying system includes at least three workpiece storage chambers arranged in a predetermined arrangement direction. A conveyance chamber is provided adjacent to the workpiece storage chambers. A workpiece processing chamber is provided adjacent to the conveyance chamber on the side opposite the workpiece storage chambers. First and second workpiece conveying robots are disposed in the conveyance chamber. The workpiece conveying robots are controlled by a controller and convey workpieces between the workpiece processing chamber and the workpiece storage chambers. The first and second workpiece conveying robots are spaced from each other in the arrangement direction. Each workpiece conveying robot conveys a workpiece into and out of at least two of the workpiece storage chambers. | 10-27-2011 |
20110252921 | INDUSTRIAL ROBOT - The present invention relates to an industrial robot and aims to provide an industrial robot capable of ensuring a long distance from a rotation axis of an arm to a tool mounting portion and accurately positioning the tool mounting portion by a compact structure. In a swing arm | 10-20-2011 |
20110252915 | INDUSTRIAL ROBOT - The present invention is characterized by arranging a flow path | 10-20-2011 |
20110238360 | METHOD FOR EVALUATING RELIABILITY OF ELECTRICAL POWER MEASURING DEVICE - A method is provided for evaluating the reliability of an electrical power measuring device for measuring high-frequency electrical power. To build an evaluation system, the measuring device, together with a reference electrical power measuring device, is arranged between a high-frequency power supply device and an artificial reproduction load, which includes an impedance conversion device and a reference load. Using this system, an uncertainty range of an electrical power measured value measured by the measuring device is calculated, according to a prescribed calculation formula, from the electrical power measured value, and a judgment is made as to whether or not the electrical power measured value measured by the measuring device is within the uncertainty range. If it is within the uncertainty range, the measuring device is evaluated as being reliable, while if it is not within the uncertainty range, the measuring device is evaluated as being unreliable. | 09-29-2011 |
20110238356 | HIGH-FREQUENCY MEASURING DEVICE AND HIGH-FREQUENCY MEASURING DEVICE CALIBRATION METHOD - A method is provided for calibrating voltage values and current values detected by a high-frequency measuring device. In a first step, a first parameter is calculated based on impedances calculated when the measuring device is connected to a first set of three reference loads and impedances of the first set of three reference loads. In a second step, plasma processing is carried out with the measuring device connected to a load to be measured, and detected voltage and current values are calibrated using the first parameter, and impedances as viewed from a connection point towards the load side are calculated based on the calibrated voltage and current values. In a third step, three impedances that encompass, when displayed on a Smith chart, a narrower range than a range encompassed by the impedances of the first set of three reference loads are determined, where the narrower range includes the impedances calculated in the second step. In a fourth step, a second parameter is calculated based on impedances calculated when the measuring device is connected to a second set of three reference loads respectively having the three impedances and also on impedances of the second set of three reference loads. In a fifth step, the measuring device is connected to the load to be measured, and detected voltage and current values are calibrated using the first parameter and the second parameter. | 09-29-2011 |
20110238215 | PROGRAMMING METHOD FOR A ROBOT, PROGRAMMING APPARATUS FOR A ROBOT, AND ROBOT CONTROL SYSTEM - An operator inputs a sensing instruction at a sensing point, which is a rough taught point, in a teaching mode (S | 09-29-2011 |
20110234201 | HIGH-FREQUENCY MEASURING DEVICE AND HIGH-FREQUENCY MEASURING DEVICE CALIBRATION METHOD - A method is provided for calibrating a high-frequency, measuring device so as to accurately measure high-frequency parameters within a chamber. A calibration parameter is calculated from impedance of a first set of three reference loads measured by a high-frequency measuring device and the true values of those impedances. A calibration parameter is calculated from an S parameter measured between a connection point where the high-frequency measuring device is connected and the inside of the chamber of a plasma processing device. An impedance within the chamber is calculated from a voltage signal and a current signal calibrated using the above calibration parameters. A second set of three reference loads, which include the impedance calculated in Step | 09-29-2011 |
20110222243 | POWER SUPPLY APPARATUS INCLUDING FAN FOR AIR COOLING - A power supply apparatus includes an air path extending longitudinally, a fan that blows air into the air path in a direction intersecting a longitudinal direction of the air path, and a plurality of electronic components arranged in the longitudinal direction. Each of the electronic components is cooled by air passing through the air path. With this configuration, it is possible to efficiently cool the electronic components without compromising the flexibility of arrangement of the various electronic components. Also, a dust removal operation can be readily performed without the possibility of damaging the fan. | 09-15-2011 |
20110115466 | CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTOR, CURRENT DETECTOR AND VOLTAGE DETECTOR - A current detection printed board includes: a board having a penetration hole that penetrates the board; and at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, wherein, when a conductor, in which an AC current flows, is disposed to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction. | 05-19-2011 |
20110063883 | INVERTER CONTROL CIRCUIT AND INTERCONNECTION INVERTER SYSTEM HAVING THAT INVERTER CONTROL CIRCUIT - An inverter control circuit ( | 03-17-2011 |
20110010006 | ROBOT CONTROL SYSTEM - A robot control system has a portable operating device TP and a robot control device RC. The portable operating device TP is actuated by a rechargeable secondary battery and used to operate a robot R. The robot control device RC is capable of wireless communication with the portable operating device TP and performs automatic operation of the robot R based on teaching data provided by the portable operating device TP. The robot control system causes an emergency stop of the robot R when the wireless communication between the portable operating device TP and the robot control device RC is interrupted. The robot control system further includes a charging device CU, a connection monitoring section | 01-13-2011 |
20100277843 | HIGH-FREQUENCY POWER SUPPLY SYSTEM - A high-frequency power supply system includes an anomaly detector | 11-04-2010 |
20100259247 | CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTOR, CURRENT DETECTOR AND VOLTAGE DETECTOR - A current detection printed board includes: a board having a penetration hole that penetrates the board; and at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, wherein, when a conductor, in which an AC current flows, is disposed to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction. | 10-14-2010 |
20100254172 | PWM SIGNAL GENERATOR, AND INVERTER EQUIPPED WITH THIS PWM SIGNAL GENERATOR - The PWM signal generator of the present invention generates a first pulse waveform in which a first on-time ΔT | 10-07-2010 |
20100224343 | WORK CARRIER - A work carrier includes a work carrying mechanism, a cooling pipe for cooling the work carrying mechanism by circulation of a coolant, a thermally-conductive elastic member held in contact with the work carrying mechanism and the cooling pipe, and a fixing element for fixing the cooling pipe to the work carrying mechanism. The elastic member is made of aluminum, for example. Before fixed, the elastic member is bent in a cross section perpendicular to the longitudinal direction of the cooling pipe. | 09-09-2010 |
20100213181 | Arc Start Control Method - An arc start control method comprises starting advance of a welding wire, and determining that a distal end of a welding wire contacts a base material and short circuit is caused. If a feed torque value is a reference torque value or greater, the welding wire is retracted and the distal end of the welding wire is separated from the base material without generating an arc. If the feed torque value is smaller than the reference torque value the welding wire is retracted and the distal end of the welding wire is separated from the base material and an initial arc is generated between the welding wire and the base material. | 08-26-2010 |
20100209217 | WORK TRANSFER APPARATUS - A work transfer apparatus includes a hand mechanism, a scissors lift mechanism, a seat, and a rotary mechanism. The hand mechanism supports and reciprocates a work. The scissors lift mechanism supports the hand mechanism, and moves the hand mechanism vertically, i.e., raises or lowers it. The seat supports the scissors lift mechanism. The rotary mechanism rotates the seat around a vertical axis. The scissors lift mechanism includes a stage on which the hand mechanism is mounted, at least one scissors link, and a lift driver. | 08-19-2010 |
20100206852 | Forced Pressure Power Supply Torch - A welding torch | 08-19-2010 |
20100196124 | WORK TRANSFER APPARATUS - A work transfer apparatus includes a work carrying mechanism, a driving source that drives the work carrying mechanism, a sealed box that accommodates the driving source in a hermetically sealed state, and a coolant circulation path provided in the sealed box for cooling the driving source. The sealed box includes a box body with an opening, and a partition lid for closing the opening. The partition lid includes an outer plate member and an inner plate member superposed on the outer plate member. The coolant circulation path is disposed at the interface between the outer plate member and the inner plate member. | 08-05-2010 |
20100193486 | ARC START CONTROL METHOD - To start consumable electrode arc welding, an initial current is supplied to a welding wire after causing the welding wire to contact a base material and retracting the welding wire from the base material. In this manner, an initial arc is generated. The welding wire is retracted continuously for an initial arc lift period Ti with the initial arc maintained. Afterwards, the initial arc is switched to a steady arc. A predetermined weld pool formation period Tp is set after the initial arc lift period Ti. In the weld pool formation period, a weld pool formation current greater than the initial current is supplied with the initial arc maintained and the welding wire is caused to proceed and fed to the base material. In the weld pool formation period, a weld pool is formed by the initial arc without allowing the welding wire to release droplets and contact the base material. By this method, the initial arc is switched to the steady arc state after the weld pool has been formed. This suppresses generation of spatter caused by transfer of the droplets to the base material. | 08-05-2010 |
20100181296 | PULSE ARC WELDING METHOD - A pulse arc welding method is provided for performing welding by causing welding current to flow through a welding wire and a base metal via a power supply tip. The welding current has a pulse cycle made up of a first peak time, a second peak time and a base time. A first peak current is applied during the first peak time, a second peak current, smaller than the first peak current, is applied during the second peak time, and a base current is applied during the base time. When a tip-base distance between an end of the power supply tip and the base metal is smaller or greater than a reference value, the first peak current is increased or decreased in accordance with the difference between the reference value and the tip-base distance. | 07-22-2010 |
20100176904 | CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, AND CURRENT/VOLTAGE DETECTOR USING SAME, AND CURRENT DETECTOR AND VOLTAGE DETECTOR - A current detection printed board includes: a board having a penetration hole that penetrates the board; and at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, wherein, when a conductor, in which an AC current flows, is disposed to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction. | 07-15-2010 |
20100155383 | AC PULSE ARC WELDING CONTROL METHOD - A control method for AC pulse arc welding performed upon application of cyclic AC welding current is provided. The welding current has a cycle including an electrode negative polarity period and an electrode positive polarity period subsequent to the electrode negative polarity period. In the control method, an electrode negative polarity base current and a subsequent electrode negative polarity peak current are applied during the electrode negative polarity period. The electrode negative polarity base current has an absolute value smaller than a first critical value, and the electrode negative polarity peak current has an absolute value greater than the first critical value. Then, an electrode positive polarity peak current is applied during the electrode positive polarity period. The electrode positive polarity peak current has a value greater than a second critical value. | 06-24-2010 |
20100038345 | CONSUMABLE ELECTRODE GAS SHIELD ARC WELDING TORCH AND POWER FEED TIP - A consumable electrode gas shield arc welding torch ( | 02-18-2010 |
20090309531 | SERVO MOTOR MONITORING APPARATUS - Disclosed a servo motor monitoring apparatus including: a magnetic pole position calculating member to extract a magnetic pole position signal of the servo motor from a motor drive line connected to the servo motor; a present position signal inputting member to receive an input of a present position signal from the position detecting member attached to the servo motor; and a monitoring member to compare operations of the servo motor based on two types of signals of the magnetic pole position signal and the present position signal of the servo motor, and to output a stop instruction signal for cutting off a power supply to the servo motor when detecting disagreement. | 12-17-2009 |
20090058398 | CURRENT/VOLTAGE DETECTION PRINTED BOARD AND CURRENT/VOLTAGE DETECTOR - A printed board, includes: a first shield portion, configured to reduce an influence of an electric field in combination with a casing accommodating the printed board, at least a part of the first shield portion being formed with a plurality of through holes; and a second shield portion, configured to reduce the influence of the electric field in combination with the casing, at least a part of the second shield portion being formed with a plurality of through holes, wherein the second shield portion is arranged alongside of the first shield portion. | 03-05-2009 |
20090035114 | Transfer apparatus - A transfer apparatus includes a stationary base, a lift base, a lifting mechanism for vertically moving the lift base, a rotary base mounted to the lift base, a rotating mechanism for rotating the rotary base about a vertical rotation axis, a linear moving mechanism supported by the rotary base, and a work hand supported by the linear moving mechanism. The lifting mechanism includes a slide guide mechanism for vertical movement of the lift base, and first and second screw-feeding mechanisms. Each screw-feeding mechanism includes a rotatable vertical screw shaft, and a nut member provided on the lift base and screwed onto the screw shaft. The first and the second screw-feeding mechanisms are spaced from each other, with the rotation axis of the rotary base being located between the first and the second screw-feeding mechanisms. | 02-05-2009 |
20090032513 | Arc welding power source - An arc welding power source supplies a start current, a welding current and a crater current as an output current in accordance with an activating signal supplied from outside. The power source includes a start period setting unit, a crater period setting unit, and a current control unit that controls the output current. The current control unit causes the power source to supply the start current and the welding current consecutively while the activating signal is in an on-state, where the start current is supplied for the start period, and the welding current is supplied for the period following the start period. The current control unit also causes the power source to supply the crater current after the activating signal is turned off, where the crater current is supplied for the crater period. | 02-05-2009 |
20090026186 | Pulse arc welding method - In pulse arc welding, a welding wire is fed at a rate corresponding to a current average set value. An arc is struck by passing a peak current for a peak period and a base current for a base period, where the peak and base periods make one pulse period. The arc transfers a droplet from the wire. The peak period includes a first peak period for a first peak current and a second peak period for a smaller second peak current. The first peak period and current are determined so that an arc anode point is formed at the top of the droplet even if the shield gas mixing ratio deviates from a standard value. The second peak period and current are determined so that one droplet is transferred during every pulse period, and beads are formed with no undercuts. | 01-29-2009 |
20080279656 | Transfer apparatus - A transfer apparatus includes a stationary base, a swivel rotatably supported by the stationary base, and a linear movement mechanism supported by the swivel and including guide rails. Hands for carrying works are supported by the guide rails and movable along a horizontal straight travel path by the operation of the linear movement mechanism. A heat reflector is provided between the hands and the guide rails. A refrigerant circulation channel includes annular spaces for ensuring constant communication between a passage on the side of the stationary base and a passage on the side of the swivel. The refrigerant circulation channel includes cooling pipes held in contact with the heat reflector. | 11-13-2008 |
20080273957 | Transfer apparatus - A transfer apparatus includes a stationary base, a swivel rotatable around a vertical rotation axis, a linear movement mechanism supported by the swivel, a hand supported by the linear movement mechanism for transferring a work along a horizontal path, a driving power source in the stationary base, and a transmission shaft arranged along the rotation axis for transmitting driving force from the driving power source to the linear movement mechanism. The linear movement mechanism includes a driving mechanism and a guide rail for movably supporting the hand. The driving mechanism has a plurality of pulleys, including a driving pulley supported rotatably around a horizontal axis, and an output belt wound around the plurality of pulleys for reciprocal movement within a predetermined section extending parallel to the movement path. The hand is connected to the output belt via a connection member. | 11-06-2008 |
20080260503 | Transfer apparatus - A transfer apparatus includes a stationary base, a swivel supported by the stationary base to be rotatable about a vertical axis, a guide member mounted on the swivel, a linear movement mechanism supported by the swivel or the guide member, a hand supported by the linear movement mechanism and moved by the linear movement mechanism for carrying a work along a straight and horizontal travel stroke, a drive source disposed inside the stationary base, and a transmission shaft disposed along the vertical axis to transmit drive power from the drive source to the linear movement mechanism. The swivel includes an upper section and a lower section detachably connected with each other. The upper section has a connecting member supported by the upper section to be rotatable about the vertical axis. The connecting member has a detachable engagement member for engagement with the transmission shaft from the above. | 10-23-2008 |
20080237208 | Feed control method for consumable electrode AC arc welding - A feed control method is provided for consumable electrode AC arc welding, in which the welding wire is fed at a predetermined wire feed rate, and a welding voltage applied to an arc is switched in alternation between electrode positive polarity and electrode negative polarity. In the method, a welding current setting signal is generated, and the wire feed rate is set to a first feed rate during a period of the electrode positive polarity, based on both the wire welding characteristics for the electrode positive polarity and the welding current setting signal. Further, the wire feed rate is set to a second feed rate during a period of the electrode negative polarity, based on both the wire welding characteristics for the electrode negative polarity and the welding current setting signal. | 10-02-2008 |
20080237172 | Transfer apparatus - A transfer apparatus includes a fixed base, a swivel, a lift mechanism for raising and lowering the swivel relative to the fixed base, a swivel mechanism for turning the swivel about a vertical swivel axis, a linear movement mechanism supported by the swivel, and a hand supported by the linear movement mechanism for transportation of a work along a linear horizontal travel stroke. The lift mechanism includes N (N is an integer equal to or greater than 2) lift members arranged for telescopic expansion and retraction relative to the fixed base. The lift mechanism also includes N lift drive mechanisms each for raising and lowering one of the lift members relative to an immediate lower-stage lift member. The swivel is supported by an uppermost one of the lift members. (FIG. | 10-02-2008 |
20080223840 | Squeezing detection control method for consumable electrode arc welding - A squeezing detection control method is provided for consumable electrode arc welding. The method includes a step of detecting a droplet squeezing phenomenon by checking that a change in a voltage or resistance between the consumable electrode and base material reaches a squeezing detection reference value, and a step of executing output control for rapidly decreasing a welding current passing through a short-circuited load when the squeezing phenomenon is detected, so that arc re-striking occurs in a state of low current. The squeezing detection reference value is set to a first value during the electrode positive polarity, and set to a second value during the electrode negative polarity. The second value is different from the absolute value of the first value, and each of the first and the second values is set such that the resultant welding state is satisfactory. (FIG . | 09-18-2008 |